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. 2021 Feb 12;21:22. doi: 10.1186/s40644-021-00391-w

Fig. 4.

Fig. 4

Immunohistochemistry: CXCR4 (both photos in same magnification: 200x) coloring in (a) squamous cell carcinoma: (long arrow) is strong positive for CXCR4 (CXCR4 positive inflammatory cells marked with short arrow); and (b) adenocarcinoma (with signet ring cell features; long arrow) scored as negative (less than three CXCR4 positive cells in high power field/HPF; one CXCR4 positive cell marked with short arrow)